While smartwatches are widely adopted these days, their input and output space remains fairly limited by their screen size. We present StrapDisplays—interactive watchbands with embedded display and touch technologies—that enhance commodity watches and extend their input and output capabilities. After introducing the physical design space of these StrapDisplays, we explore how to combine a smartwatch and straps in a synergistic Watch+Strap system. Specifically, we propose multiple interface concepts that consider promising content distributions, interaction techniques, usage types, and display roles. For example, the straps can enrich watch apps, display visualizations, provide glanceable feedback, or help avoiding occlusion issues. Further, we provide a modular research platform incorporating three StrapDisplay prototypes and a flexible web-based software architecture, demonstrating the feasibility of our approach. Early brainstorming sessions with 15 participants informed our design process, while later interviews with six experts supported our concepts and provided valuable feedback for future developments.

Related Publications

Watch+Strap: Extending Smartwatches with Interactive StrapDisplays
Konstantin Klamka*, Tom Horak*, Raimund Dachselt
In Proceedings of the ACM Conference on Human Factors in Computing Systems. CHI ’20, Honolulu, Hawaii, USA. ACM.
Publisher Video Research Website

Extending Smartwatches with Interactive StrapDisplays

Category Wearables and eTextiles
Project date 2020
Project URL imld.de/watch+strap/
Collaborators Dr. Tom Horak,
Prof. Raimund Dachselt
Video Watch on YouTube
and Methods
Tizen OS JavaScript D3 SSVG Streamed UI C Rapid Prototyping 3D-Printing Arduino Resistive Sensing Bendable EPDs
Presentation at ACM CHI '22
Virtual Event (due to COVID-19)
... See recorded talk on YouTube.